Interventionist Explanation and the Problem of Single Variable Boundary Constraints

According to Interventionism , explanations cite invariant relations which hold among multiple variables. Interventionism incorrectly implies, however, that many common scientific explanations—which cite single-variable boundary constraints—are not actually explanatory. So I propose a different account of explanation, similar in spirit to Interventionism , which gets those cases of scientific explanation right.     

Creating new memories that are quickly accessed and confidently held

In two experiments involving a total of 542 subjects, a series of slides depicting a burglary was shown. After the initial event, subjects were exposed to one or more narratives about the event that contained some misinformation or neutral information about four critical details. Finally, subjects were tested on their memories of what they saw, and their reaction times and confidence levels were measured. When subjects took a standard test in which the misinformation item was a possible response option, they responded very quickly and confidently when making this incorrect choice. Misled subjects responded as quickly and confidently to these "unreal" memories as they did to their genuine memories. It does not seem, then, that the misinformation effect arises from a large proportion of subjects who must resolve a conflict between two memories when they are tested, a conflict that would be expected to take time. When subjects took a modified test in which the misinformation item was not a possible response, misled subjects were as accurate as were controls, but they responded more slowly, regardless of whether they ultimately chose the right or wrong option. These findings indicate that misinformation does introduce some form of interference not detected by a simple test of accuracy.     

Determination of a behavioral transfer function: White-noise analysis of session-to-session response-ratio dynamics on concurrent VI VI schedules

Six pigeons were exposed to concurrent variable-interval schedules in which the programmed reinforcer ratios changed from session to session according to a pseudorandom binary sequence. This procedure corresponded to the stochastic identification paradigm (“white-noise experiment”) of systems theory and enabled the relation between log response ratios in the current session and log reinforcer ratios in all previous sessions to be determined. Such dynamic relations are called linear transfer functions. Both nonparametric and parametric representations of these, in the form of “impulse-response functions,” were determined for each bird. The session-to-session response ratios resulting from the session-to-session pseudorandom binary variations in reinforcer ratios were well predicted by the impulse-response functions identified for each pigeon. The impulse-response functions were well fitted by a second-order dynamic model involving only two parameters: a time constant and a gain. The mean time constant was 0.67 sessions, implying that the effects of abrupt changes in log reinforcer ratios should be 96% complete within about five sessions. The mean gain was 0.53, which was surprisingly low inasmuch as it should equal the sensitivity to reinforcement ratio observed under steady-state conditions. The same six pigeons were subjected to a similar experiment 10 months following the first. Despite individual differences in impulse-response functions between birds within each experiment, the impulse-response functions determined from the two experiments were essentially the same.     

Pandemic precarity: A multi-level study of neoliberal precarity and COVID-Related outcomes in the United States

Neoliberalism is the political-economic system that has characterized the United States for the past half century. Structurally, neoliberalism has involved privatization, deregulation, and government divestment from public health systems. Cultural psychologists have begun to outline the ways that neoliberalism is reflected in attitudes, ways of being, and ideologies, such as in the form of heightened individualism, justification of inequality, depoliticization, and precarity. We argue that neoliberal structures and psychologies may contribute to deleterious outcomes in the context of the COVID-19 pandemic. We demonstrate that neoliberalism at the US state level (n = 51) is associated with higher COVID mortality and case fatality rates, as well as lower vaccination rates (Study 1). We also demonstrate that individual-level (n = 8280) neoliberal ideology predicts less adaptive beliefs and attitudes such as the belief that the federal response to the pandemic was too fast and belief in COVID-related misinformation (Study 2). We demonstrate using multilevel modeling that state-level neoliberalism predicts individual-level COVID-related attitudes, which is explained in part by heightened neoliberal ideology in more neoliberal states (Study 2). This study contributes to an understanding of the structural and cultural psychological factors that have contributed to the severity of the COVID-19 pandemic in the US.     

Effects of Eyewitness Evidence on Plea-Bargain Decisions by Prosecutors and Defense Attorneys1

The present experiment tested the relative impact of two types of eyewitness evidence (identification and non identification) on plea-bargain decisions by prosecutors and defense attorneys. A hypothetical case involving a robbery was mailed to three prosecutors and three defense attorneys in each of 47 states. The subjects were randomly assigned to receive a case in which an eyewitness claimed: (a) the defendant was the criminal (identification), (b) the defendant was not the criminal (non identification), or (c) it was not possible to tell whether the defendant was the criminal (control). Similar to findings with jurors, both prosecutors and defense attorneys underutilized the non identification information in making their plea-bargain decisions. In the case of the prosecutors, there was evidence that the underutilization of eyewitness non identification was at least partially mediated by the prosecutors' predictions of juror reaction to the evidence.